216 
tlie full width of the pygidium. The specimen is quite decorticated and wdhout test. 
There are fourteen to sixteen pleurse visible, the anterior ones rather sigmoidal m 
outline. The perfect tail was probably broad oval, or shield-shaped, and many ot the 
pleural grooves are wide and open. _ j • . • ■ j. i 
This fossil is, in all probability, undescribed, and its imperfect condition is to be 
regretted. If new, I would propose for it the name of P Idllipsia ? grandis. It wi e 
figured in a separate Paper on Queensland fossils. 
Loo. and Horizon. West of the Dividing Eange, at the Crow’s ISest, near 
Mount Victoria, near Mount Morgan {Tlie late Jaynes Smith ; Mining and Ceol. Mus., 
Sydney) — Gympie Beds. 
Genus— GBIFFITHIDES, PortlocJc, 1843. 
(Geol. Report, Londonderry, &c., p. 310.) 
Geifpithides SEMiNiPEEtFS, Phillips, sp. ?, PI. 7, fig. 14. 
Asaphus seminifcriis, Philliiis, 111. Geol. York, 1S3B, Pt. 2, p. 240, t. 22, f. ^10- ^ oi f o i 
Phillipsia seminifcra, Be Koninck, Poss. Pal. Nouv.-Galles du Sud, 1877, Pt. 3, p. 34| t. 24, f. 9 and 9a. 
Griffithkles seminiferws, Woodward, Mon. Brit. Garb. Trilobites, 1883, Pt. 1, p. 28, t. 28, f. 1-J. 
Obs. A Trilobite, in many features resembling this species, has been obtained at 
two localities. At one it is represented only by a small free cheek (PI. 17, fig. 14), bu 
possessing the same ornament, and generally resembling De Koninck’s figure, as above 
given. The other specimens consist of portions of two individuals much displaced, but 
clearly showing that from ten to eleven thoracic rings existed, very convex and rounded. 
The glabella was short and semi-circular, broad and densely granuled, the basal lobes 
large, and the lateral terminations of the pleura large and spathulate. The limb of the 
glabella and pygidium was striate. 
Although otherwise corresponding with G. seminiferus, the latter has the advantag 
of size, and the limbs are plain. This, however, I opine, can hardly constitute a specific 
difference, but it may perhaps render our form a good variety, and it may be known 
as G. seminiferus, var. australasica, 
Loc. and Horizon. Stony Creek, Stanwoll {The late James Smith) ; Eockhampton 
District* (C. W. De Vis; Colin. De Vis)— Gympie Beds. 
Sub-Kingdom — MOLLU SCA. 
Class — POLYZOA. 
Obs. The determination of fossils of this class found in the Upper Palaeozoic rocks 
of Eastern Australia is rendered exceedingly difficult by their imperfect state of preser- 
vation, found, as they usually are, merely in the condition of impressions. In suc^ 
specimens the whole of the substance of the polyzoarium has been removed, 
usually not the slightest trace of the cells, but is merely represented by the hollo 
spaces from which the stems and branches have disappeared, and the cast of the mcs 
like fenestrules. This state of preservation has rendered identification very dimcu ^ 
difficulty not decreased by the obviously perplexing manner in which the characters o 
the species appear to run into one another. In the absence of definite ;nforma lo 
concerning the nature of the cells, it becomes very difficult to distinguish ^ 
species, so little reliance can be placed upon the size and relative distance apart ot 
meshes of the polyzoarium. 
* See note, p. 199. 
